J/AJ/143/129ivo://CDS.VizieR/J/AJ/143/129doi:10.26093/cds/vizier.51430129CDSLacy C.H.S.Torres G.Fekel F.C.Sabby J.A.Claret A.2017-06-12T08:25:22Z2013-07-12T08:30:51ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starsradial-velocityvisible-astronomybroad-band-photometryccd-photometryBF Dra is now known to be an eccentric double-lined F6+F6 binary star with relatively deep (0.7mag) partial eclipses. Previous studies of the system are improved with 7494 differential photometric observations from the URSA WebScope and 9700 from the NFO WebScope, 106 high-resolution spectroscopic observations from the Tennessee State University 2m automatic spectroscopic telescope and the 1m coude-feed spectrometer at Kitt Peak National Observatory, and 31 accurate radial velocities from the CfA. Very accurate (better than 0.6%) masses and radii are determined from analysis of the two new light curves and four radial velocity curves. Theoretical models match the absolute properties of the stars at an age of about 2.72Gyr and [Fe/H]=-0.17, and tidal theory correctly confirms that the orbit should still be eccentric. Our observations of BF Dra constrain the convective core overshooting parameter to be larger than about 0.13H_p_. We find, however, that standard tidal theory is unable to match the observed slow rotation rates of the components' surface layers.2012AJ....143..129Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/129CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2012)B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2013)I/259 : The Tycho-2 Catalogue (Hog+ 2000)III/249 : Stellar radial velocities bibliographic catalog (Malaroda+, 2006)II/271 : TASS Mark IV patches photometric catalog, version 2 (Droege+, 2007)J/A+A/537/A117 : Velocity curves of SW CMa and HW CMa (Torres+, 2012)J/A+A/546/A61 : Radial velocities for XHIP catalogue (de Bruijne+, 2012)J/AJ/142/185 : Properties of the EB stars HY Vir (Lacy+, 2011)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/other/IBVS/5918 : Minima and maxima of 452 variables (Hubscher+, 2010)J/other/IBVS/5941 : Minima and maxima of 292 variables (Hubscher+, 2010)J/AJ/138/1622 : Absolute properties of LV Her (Torres+, 2009)J/other/IBVS/5830 : Minima and maxima of 292 variables (Hubscher+, 2008)J/A+A/446/785 : Catalogue of eclipsing variables (Malkov+, 2006)J/AJ/130/2838 : Velocity and light curves of RW Lac (Lacy+, 2005)J/AcA/54/207 : Ephemerids of eclipsing binaries (Kreiner, 2004)J/AJ/128/1340 : Properties of the EB star V459 Cas (Lacy+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/129https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/129http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/129https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/129https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/129http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/129GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/143/129/table1Radial velocities of BF Dra and residuals from the fitted orbitrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[4470.35/55872.62] Heliocentric Julian Date; HJD-2400000dtime.epochdoublePhaseOrbital phasetime.phasefloatRV1[-102/44]? Primary radial velocitykm/sspect.dopplerVelocfloatnullableRV2[-108/44]? Secondary radial velocitykm/sspect.dopplerVelocfloatnullableO-C1? Primary (O-C) residualkm/sstat.fit.residual;stat.fit.omcfloatnullableO-C2? Secondary (O-C) residualkm/sstat.fit.residual;stat.fit.omcfloatnullablePlacePlace/Source of observation (1)meta.codecharObsObservatory (Fairborn or KPNO) (2)meta.id;instr.obstycharInstInstrument (TRES, CORAVEL, DS or coude feed) (3)meta.id;instrcharJ/AJ/143/129/table3Times of eclipse of BF Dra and residuals from the ephemeris curve fitrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintYear[1931.8/2011.6] Date of minimum lightyrtime.epochfloatHJD[26631.3/55779.8] Heliocentric Julian Date; HJD-2400000dtime.epochdoublee_HJDError on HJD (precision)dstat.error;time.epochdoubleCycle[-2573/27] Cycle numbermeta.id;meta.mainintType[1/2] Eclipse type (1=deeper eclipse) (1)meta.noteintO-C[-0.11955/0.14833] (O-C) residualdstat.fit.residual;stat.fit.omcdoubleMethObservational method (pe=photoelectric, pg=photographic or vis=visual)stat.fitcharRefReference (in refs.dat file)meta.ref;pos.frameintJ/AJ/143/129/table5URSA Webscope (Univ. Arkansas) differential photometry of BF DrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhaseOrbital phasetime.phasedoubleDVmagURSA differential V band magnitudemagphot.mag;em.opt.V;arith.difffloatHJD[52314/55831] Heliocentric Julian Date; HJD-2400000dtime.epochdoubleJ/AJ/143/129/table6NFO (New Forest Observatory, New Mexico) differential photometry of BF DrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[0/1] Orbital phasetime.phasedoubleDVmagNFO differential V band magnitudemagphot.mag;em.opt.V;arith.difffloatHJD[53447/55831] Heliocentric Julian Date; HJD-2400000dtime.epochdoubleJ/AJ/143/129/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRef[1/22] Reference numbermeta.id;meta.mainintprimaryBibCodeBibliographic codemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar